A:人正常步行的平均速度是10m/
B:你手中物理试卷的宽度约为26cm
C:一名初中生从二楼匀速下到一楼重力做的功约150J
D:洗澡水的温度大约是80℃
如图所示,E板上发射的电子初速度为零,两电源的电压分别为45V、30V,A、B两板上有小孔OA、OB,则电子经过OA、OB孔以及到达C板的动能分别为:EkA=____eV,EkB=____eV,EkC=____eV.
We are planning a trip ______ France? Would you like to join ______ us?
—Why are you standing here, Tom?—I can't see the blackboard clearly. Two tall boys are sitting ____ me.